Auxiliary air valve for gas engines



Mar. 13, 1923. 7

Fl MI AUXILIARY AIR VALVE FOR (5A8 ENGINES.

HLED JULY 2 21 I920.

M U M rnenors M.

Patented Mar. 13, 1923.

iarrsajsraras HART,,.OF CANTON, OHIO, ASSIGNOR OF TWO THIRZDS TO ALBERT B.

THOMAS, OF CANTON, OHIO. i

AUXILIARY-AIR, VALVE FOR GASHENGI'NES.

Application filed July 22, 1920. seriaiiv'o. 398,233.

To all whom it may concern:

Be it knownthat LFRANOIs M. HART, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a new and useful Improvement in Auxiliary Air Valves for Gas Engines, of which the following is a specification. I

Theinvention relates to internal combustionengines receiving fuel in the form of gas 3 or vaporized gasoline combined with air from a carburetor or other source of supply; and the objects of the present invention are to provide manually controlled means for supplying additional air to the engine in the desired amount to meet requirements at varying speeds.

The gasoline and air which are supplied to the engine from the carburetor are mixed in proper proportions for the requirements of the engine at the starting and during oomparatively slow speeds when the mixture in the combustion chamber is not subject to as high pressure and temperature as prevails during the high speeds when the engine becomes heated and accordingly there is not sufiicient air in the mixture to cause complete combustion when the engine is running at the higher speeds and the ignition takes place more frequently and with less duration.

With the present invention this difficulty is overcome and additional air may be admitted into the engine in proportion to its requirements at increased speeds, by means of an air inlet valve located in the intake manifold of the engine between the carburetor, and the cylinders, means being operatively connected to the valve for manually opening the same to any desired degree and holding the valve in the opened position.

With these objects in view the invention consists in the novel construction and arrangement of parts, hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claim, it being understood that various changes in the form, proportions, size and minor details of construction may be made within the scope of the appended claim, without departing from the spirit or sacrificing any of the advantages of the invention.

The invention thus set forth in general terms is illustrated in the accompanying drawings forming part hereof, in which- F igurel is an elevation of an'automobile engineembodying the invention;

Fig. 2, an end elevation of the valve; 2 gig. 3, a section on the line 33, Fig. 2; an Fig. 4, a section on the line 4-4:, Fig.

is forming a part of this specification in which similar numerals of reference indicate corresponding parts throughout the several V18WS,

The type of engine employed. for illustrating the invention includes the cylinders l, the intake manifold 2, the the exhaust manifold 4. The dash board of. the automobile-is shown in section at 5.

An auxiliary air valveindic-ated generally by the numeral 6 is located in the intake manifold at a point between the carburetor and the inlet to thecylinders. A threaded nipple 7 is provided upon this valve by means of which it is inserted into the intake manifold and a bore 8 extends from the inner ends of the valve to a point intermediate the extremities thereof terminating in a valve seat 9 arranged to seat the needle valve 10. A transverse bore 11 extends through one side of the valve casing to the enlarged bore 12 which receives the needle valve. An air inlet pipe 13 being located in said-transverse bor The stem 14 of the needle valve is provided with an annular shoulder portion 15, a coil spring l6fbeing located around the valve stem between said annular shoulder and the inturned annular flange 17 of the threaded collar 18 which is mounted upon the threaded extension 19 .of the valve casing.

The valve stem 14 extends through the collar 18 and is bifurcated as shown at 19, the plate wardly extending lug 21 which is pivotally connected to the bifurcated portion of the valve stem by means of a pin 22. The outer face of the collar 18 is slotted at23 to receive the ears 24 of the plate 20 and a wire 25 or other suitable flexible member is connected to the outer end of the plate 20 and carburetor 3 and f 20 being provided with the in extends through an aperture 26 in the dash board and over a pulley 27 mounted upon the dash board, being connected to the operating lever 28 which is pivotally mounted at 29 upon a bracket 30 carried by the dash board.

The rack segment 31, concentric with the pivotal point 29, is mounted upon the bracket 30 and a locking pawl 32 is pivotally mounted upon the operating lever 28 for the purpose of locking the lever at any desired point upon the rack segment.

Referring to Fig. 3 of the drawingsit will be seen that normally the spring 16 bearing against the annular shoulder 15 upon the valve stem holds the needle valve 10 in the closed position, the valve being seated upon the valve seat 9 and cutting olf access to the bore 8.

By exerting a pull upon the wire 25 the plate 20 will be rocked upon one of the ears 2a unseating the valve 10 and allowing air to be drawn in by the action oi the cylinders through the air inlet pipe 13 and the bore 8 into the intake manifold where it will be mixed with themixture from the carburetor. As the valve 10 is opened to a greater degree a greater amount of air will be drawn in through the inlet pipe 13 and the valve may be held in any desired position by locking the operating lever 28 at any desired point upon the rack segment 31.

It will thus be evident that with the construction above described the valve may be controlled at the will of the operator to allow any desired amount of air to be drawnin'tothe intake manifold which may be required to increase the speed of the engine, and the valve may be he'ldin any desired position.

I claim:

An engine, means for supplying a gaseous fuel thereto, and means for thereto including an inlet tube, a valve slidably mounted therein, means for normally holding the valve in closed position,'the outer end radially, and the outer end of the valve being bifurcated, a plate having a lug extending into the bifurcation of the valve and pivoted thereto, wings upon the plate extending into the slotted end of the inlet tube, a wire connected to the outer end of the plate for rocking the plate upon one of its ears to open the valve and means connected to the wire for holding thevalve in any desired position.-

In testimony that I claim the above, I have hereunto subscribed my name.

FRANCIS M. HART.

supplying air of the inlet tubebein slotted 

